Ming C. Wu (Advisor)

Research Advised by Professor Ming C. Wu

BPN472: Nanoplasmonic Light Emitting Devices for Ultra-Fast Modulation

Erwin K. Lau
2010

Semiconductor nanocavities are of interest for their potential as threshold-less lasers and high-speed modulated sources. When cavity volumes are shrunk below the size of a cubic wavelength, the rate of spontaneous emission can be enhanced. This so-called Purcell enhancement has lead to the misconception that the modulation speed of nanocavity lasers can be significantly enhanced beyond that of their classical (large volume) counterparts. Here, by performing a detailed analysis, we show that the modulation bandwidth can, indeed, be increased by the Purcell effect, but that this...

MCW3: MEMS-Actuated Tunable Optical Microdisk Resonators

Ming Chang M Lee
2005

Semiconductor optical microdisk resonators are bulding blocks for most wavelength-division-multiplexing (WDM) photonic integrated circuits, including wavelength filters and add-drop multiplexers, optical delay lines, and group velocity dispersion compensators. Adding a tuning mechanism is desired to implement a dynamically reconfigurable function. The goal of this project is to make a high quality factor (Q), tunable, integrated microidk resoantor.

Project end date: 08/31/05

MCW6: 1xN^2 MEMS-Based Wavelength-Selective Switch

Jui-che Ted Tsai
2005

The goal of this project has been focused on developing a high port-count wavelength-selective switch using micromirror arrays.

Project end date: 08/31/05

MCW5: High Fill-Factor Two-Axis Analog Micromirror Array

Jui-che Ted Tsai
2005

The major goal of this project has been focused on the development of two-axis analog micromirror arrays with high fill factors. These micromirror arrays are designed for the 1xN^2 wavelength-selective switches.

Project end date: 08/31/05

MCW1: Optoelectronic Tweezers for Cell and Microparticle Manipulation

Pei-Yu (Eric) Chiou
2005

Optical tweezers have been widely used to manipulate biological cells and particles since it was demonstrated by Ashkin in 1986. However, optical manipulation using direct optical force requires tight optical focusing and is only availabe in small area. Here, we proposed a novel mechanism which enables optical manipulation using optical power 5 orders of magnitude less than that of conventional optical tweezers. This mechanism is realied by inducing optically defined virtual electrodes on semiconductive thin films. This induced virtual electrodes create highly non-uniform electric...

MCW7: Single-Chip MEMS-Based Optical Crossconnect

Chao-Hsi Josh Chi
2006

The goal of this project is to develop monolithic 1xN wavelength-selective switches (WSS) and NxN wavelength-selective cross connects (WSXC) for WDM networks. The Si-based planar lightwave circuits (PLC) and the MEMS micromirrors are monolithically fabricated on a silicon-on-insulator (SOI) chip. All optical paths are defined by photolithography and no optical alignment is necessary. The WSS and WSXC can be deployed in mesh networks. There is no need for OEO conversion, and they are format and bit-rate transparent.

Project end date: 01/25/07

BPN336: Tunable microdisk filters for DWDM optical network applications

David Leuenberger
Jin Yao
2006

Semiconductor optical microdisk resonators are building blocks for many dense wavelength-division-multiplexing (DWDM) applications. Since wavelength determines the routing in a DWDM network, the ability to manipulate the spectral characteristics of in-line devices in a dynamic way is highly desirable. Microdisk resonators enable many functionalities in the optical layer such as demultiplexing, adding/dropping channels and optical bandwidth allocation.

Project end date: 01/25/07

LWL16: On-Chip DNA Transformation by Local Heat Shock and Cell Cryopreservation

Sha Li
2007

To develop DNA transformation by local heat shock and on-chip cryopreservation of cells with MEMS technology.

Project end date: 02/02/07

MCW4: MEMS-Actuated Tunable Optical Microtoroidal Resonators

Jin Yao
2007

Microresonators are key enabling devices or elements in numerous application aspects.The goal of this project is to study and improve the on-chip integration and performance of microresonators,so that they can be more effiective building blocks for wavelength-division-multiplexing (WDM) photonic integrated circuits, such as on-chip channel add-drop filters, wavelength-selective switches, group velocity dispersion compensators, compact nonlinear optical devices, and optical sensors.

Project end date: 07/24/07

MCW9: Tunable SOI Microring Optical Modulator

Sagi Mathai
Joanna Lai
Xin Sun
2007

CMOS scaling driven by “Moore’s Law” has allowed great improvements in microelectronic integrated circuit technology. In addition, high index contrast SOI optical waveguides are receiving much attention for their potential in implementing high density photonic integrated circuits alongside microelectronics. This project entails the design, fabrication, and experimental demonstration of a tunable SOI microring optical modulator with the potential for integration with CMOS microelectronics.

Project end date: 07/24/07